body {
  background: radial-gradient(circle, #464646, #303030);
}

hr {
  height: 2px;
  background-color: #000;
  border: none;
}

p {
  margin: 0;
  padding: 0;
}

.box {
  border: 3px solid #000000;
  width: 75vw;
  padding: 5px;
  margin: 0 auto;
}

.explanation {
  font-size: 1.5vw;
}

img {
  display: flex;
  margin: 20px auto;
  height: auto;
  width: 15rem;
}

footer {
  margin-top: 10vw;
}